[SRU][Focal][OEM-5.6][PATCH 0/1] No sound, Dummy output on Acer Swift 3 SF314-57G with Ice Lake core-i7 CPU

Hui Wang hui.wang at canonical.com
Wed Jul 29 04:25:53 UTC 2020

BugLink: https://bugs.launchpad.net/bugs/1877757

This patch is already in the 5.8-rc1, so it is already in the Groovy kernel.
I thought this patch will be merged to ubuntu kernel with stable patches,
but today a ubuntu user pushed me to do sth to let this patch be merged
to ubuntu kernel asap, so I send this SRU.

On this machine, after booting up, there is no valid sound card, the
gnome-control-center shows a dummy output only. check the dmesg, the alsa
sof driver fails to initialize.

Backport a patch from upstream, after applying this patch, the sof driver
will not fail anymore even the codec driver is hda_generic

[Test Case]
A couple of users already test this patch on their machines, after booting
up, there is a valid sound card, and could output sound from output devices.

[Regression Risk]
Low, this is cherry-picked from upstream, and this just adds a new kind of
codec (generic) support, and a couple of ubuntu users already verified this

Kai Vehmanen (1):
  ASoC: SOF: Intel: hda: fix generic hda codec support

 sound/soc/sof/intel/hda-codec.c | 51 +++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 6 deletions(-)


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